prosecutors accuse tsarnaev and his older brother, tamerlan, of setting off two bombs last week near the finish line of the race. three people were killed. more than 170 were injured. the older brother died on friday after a shootout with police. u.s. media are reporting that dzhokhar tsarnaev told investigators that he and his brother planned and carried out the attacks by themselves. he said they were motivated by religion but had no involvement with terrorist groups. reports say the brothers learned how to make bombs on the internet. white house press secretary jay carney said tsarnaev will be tried as a civilian. some lawmakers had wanted him to be classified as an enemy combatant. >> he will not be treated as an enemy combatant. we will prosecute this terrorist through our civilian system of justice. >> carney defended an fbi investigation of tamerlan tsarnaev two years ago. carney said agents interviewed him and members of his family but found no evidence of terrorist activity. >>> a car bomb has exploded outside the french embassy in the libyan capital of tripoli. at least two